After upgrading from Ubuntu 16.04 to the latest Bionic build (as of 10 March 2018), I tried launching Slic3r, and it did run; however, the Plater view shows no boundary for the build plate. I'm attaching a screen shot to show the problem (with a 20mm test cube loaded). The printer I'm using is a delta printer with a round build plate, and its boundaries should be visible in the Plater. Note that the build plate boundary IS shown in the 2D tab, but not in the 3D, Preview, or Layers tabs. This worked fine on the same computers under 16.04. (I've verified this issue on two computers -- a MacBook Air and a Lenovo Ideapad U530.)
Here's some version information, from the Lenovo (but both computers have up-to-date software):
$ lsb_release -rd
Description: Ubuntu Bionic Beaver (development branch)
Release: 18.04
$ $ apt-cache policy slic3r
slic3r:
Installed: 1.2.9+dfsg-9
Candidate: 1.2.9+dfsg-9
Version table:
*** 1.2.9+dfsg-9 500
500 http://nessus.rodsbooks.com/ubuntu bionic/universe amd64 Packages
100 /var/lib/dpkg/status
$ apt-cache policy xserver-xorg-core
xserver-xorg-core:
Installed: 2:1.19.6-1ubuntu2
Candidate: 2:1.19.6-1ubuntu2
Version table:
*** 2:1.19.6-1ubuntu2 500
500 http://nessus.rodsbooks.com/ubuntu bionic/main amd64 Packages
100 /var/lib/dpkg/status
$ uname -a
Linux bram 4.15.0-10-generic #11-Ubuntu SMP Tue Feb 13 18:23:35 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
---
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2017-10-23 (138 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
Package: slic3r 1.2.9+dfsg-9
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Tags: bionic
Uname: Linux 4.15.0-10-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dialout dip lpadmin mythtv plugdev sambashare sudo
_MarkForUpload: True
apport information